Influence of ceramic particles as additive on the mechanical response and reactive properties of Al/PTFE reactive composites. Issue 3 (8th January 2020)

• Record Type: Journal Article
• Authors: Wu, Jiaxiang; Huang, Junyi; Liu, Qiang; Chen, Yong; Li, Yuchun; Yang, Li; Yin, Qin; Gao, Zhenru; Wu, Shuangzhang; Ren, Xinxin
• Is Part Of: RSC advances. Volume 10:Issue 3(2020)
• Page Start: 1447
• Page End: 1455
• Publication Date: 2020-01-08
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c9ra09291a
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Al/SiC/PTFE and Al/Al2 O3 /PTFE samples with different component ratios were prepared to investigate the influence of ceramic particles as additive on the mechanical response and reactive properties of Al/PTFE reactive composites. Abstract : To investigate the influence of SiC and Al2 O3 as additives on the mechanical response and reactive properties of Al/PTFE (aluminum/polytetrafluoroethylene) reactive composites, Al/SiC/PTFE and Al/Al2 O3 /PTFE samples with different component ratios were prepared for quasi-static compression and drop-weight tests. Al/Al2 O3 /PTFE samples with different particle sizes were prepared for simultaneous thermal analysis experiments. The stress–strain data, characteristic drop height and thermogravimetry-differential scanning calorimetry (TG-DSC) curves of the composites were recorded. The results show that the addition of SiC and Al2 O3 significantly enhance the strength of Al/PTFE. The enhancing effect of SiC on the composite strength was stronger than that of Al2 O3 . The addition of SiC and Al2 O3 contribute toward reducing the sensitivity of the composites, where the reducing effect of Al2 O3 on Al/PTFE sensitivity was weaker than that of SiC. Nanoscale Al2 O3 reacts with PTFE to form AlF3, and the reaction heat decreases dramatically with an increase in the Al2 O3 particle size. The addition of nanoscale Al2 O3 improves the reaction heat and energy density of the composites.